Is this a complex profile beam?
Either an existing one or one you have created.
If so then in the profile editor you will probably find the the fill for the beam is not on the origin (x).
The origin will become the reference line for the beam - the blue line you are seeing.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11